P-S-577C (AMENDMENT 1), FEDERAL SPECIFICATION: SOAP, GRIT (PASTE WITH MINERAL SCRUBBER, AND POWDER WITH VEGETABLE SCRUBBER) (23 MAR 1977)
P-S-577C (AMENDMENT 1), FEDERAL SPECIFICATION: SOAP, GRIT (PASTE WITH MINERAL SCRUBBER, AND POWDER WITH VEGETABLE SCRUBBER) (23 MAR 1977).